Combined friction drive and brake mechanism.



4 J. W. GREEN. GOMBINEDFRIGTION DRIVE AND BRAKE MEGHANISM.

APPLIUATION HL'D JULYz, 1910.

` Patented Apr. 18, 1911,

[NVE/WOR ATTUH/V E Y UITED STAES 4PAJIET OFFICE.

JAMES W. GREEN, OF PORTLAND, OREGON.

COMBINED FRICTION DRIVE AND BRAKE MECHANISM.

To all whom 'it may concern.

Be it known that I, JAMES 1W. GREEN, a citizen of the United States, and a resident of Portland, in the count-y of Mult-- nomah and State of Oregon, have invented a new and useful Improvement in Combined Friction Drive and Brake Mechanism, of which the following is a specification.

This invention has for its object to obtain a combined friction drive and brake mechanism, serviceablefor hoisting and power transmitting, and other operating devices; further to so construct my mechanism that the same comprises only few parts, and is of durable construction, and to so arrange the mechanism, as a whole, that a short `movement of a lever will simultaneously release the brake and throw oii the friction transmission, and vice versa.

To this end my invention comprises the specific features hereinafter set forth.

In the drawings: Figure l is a sectional plan view, showing` ground sills or timbers, on which is rotatably mounted a drum and driving devices embodying my invention; Fig. 2 is an elevation of the near side of the device shown in Fig. l, this view showing the operating lever and connections, which are omitted in the preceding view; Fig. 3 is a sectional detail of the sha of my device, also showing the friction disk keyed to one end of the shaft, the thread sleeve provided at the opposite end of the shaft, and the crank arm provided on such sleeve for rotating thesame; Fig. 4 is a 'detail of a strap ring constituting 011e of the parts of my invention; and Fig. 5 1s a perspective detail of a nut-like member used in my device.

On the ground sills, a, b, connected by cross ties p, p are mounted bearing blocks and boxes, cl, e, in which the ends of the driving shaft c are journaled. At one end of the driving-shaft c is rigidly mounted a transmission friction disk g, and at the opposite end of the shaft is mounted a disk n, constituting astationary brake member, being bolted to the frame member, Z9, by bolts g, q. The friction disk g is rigidly secured in place on the shaft by means of a key z', inserted in the key-way j, shown in Fig. 3. The disks g, n are made with bevel faces 71 o. On the shaft c is loosely mounted a drum 7c, provided at its ends with integral flanges Z, m, cup-shaped at the rims so as to be adapted to have operative contact either with the friction disk g, or the brake mem- Specification of Letters Patent.

Application led July 2, 1910.

Patented Apr. 18, 1911.

Serial No. 570,179.

ber n. The drum is further provided with an integral hub r, which is provided with a peripheral groove, in which is loosely mounted a rim-strap s, provided with laterally extending trunnions, t, t, on which are aflixed the inner ends of eye-bolts u, u, which are provided with threaded extremities extending through the lateral arms o of av nut-like plate or yoke member I21, which is secured in place on the eye-bolts, u, u, by nuts w, w. Said nut-like member oryoke v is mounted on a sleeve which is mounted on the project-ing end of the shaft c, and is provided with an exterior peripheral thread. The sleeve .r is provided with an integral crank arm 2, which is connected by a rod 3 with a lever 4, the lower end of which lever is pivoted to a lug 5, on the ground-sill b.

As will be observed from Fig. 1, the threaded sleeve m is held against lengthwise movement on the shaft between the shoulder provided on the lat-ter and a nut y 011 the threaded extremity a of the shaft c.

By moving the lever 4 the sleeve Q3 is partially rotated, which shifts the position of the drum, bringing it into operative contact either with the brake member n or the disk g.

Vhile the brake member a is conveniently made in the form of a disk, I do not confine myself to such construction.

I claim:

" l. In a friction drive, the combination of a shaft and bearings therefor; a friction disk fast on one end of the shaft; a stationary brake member at the opposite end of the shaft; a drum loose on the shaft between said friction disk and the brake member, said drum provided with flanges at its ends; the parts adapted to canse the flanges of the druln to be operatively engaged by either the friction disk or the brake member when placed in contact therewith; a sleeve on one end of the shaft exterior of the drum; means holding said sleeve against endwise movement; a yoke threaded on said sleeve; connections between said yoke and the drum; and means for rotating the sleeve in order to shift the drum.

9.. In a friction drive, the combination of a shaft and bearings therefor; a friction disk fast on one end of the shaft; a sta-tionary brake member at the opposite end of the shaft; a drum loose on the shaft between said friction disk and the brake member, said drum provided with flanges at its ends;

the parts adapted to cause the flanges of the drum to be operatively engaged by either the friction disk or the brake member when placed in contact therewith; a sleeve on one end of the shaft exterior of the drum; means holding said sleeve against endwise movement; a. yoke threaded on said sleeve; said drum provided with a hub; a strap ring ro tatably secured on said hub; connections between said strap ring and said yoke; and means for rotating the sleeve in order to shift the drum.

3. In a friction drive, the combination of a shaft and bearings therefor; a friction disk fast on one end of the shaft; a stationary brake member at the opposite end of the shaft; a drum loose on the shaft between said friction disk and the brake member; said drum provided with flanges at its ends; the parts adapted to cause the flanges of the drum to be operatively engaged by either the friction disk or the brake member when placed in contact therewith; a sleeve on one end of the shaft exterior of the drum; means holding said sleeve against endwise move nient; a yoke threaded on said sleeve; a strap ring rotatably secured on said hub; said strap ring provided with lateral projections; said yoke also provided with lateral arms; bolts connecting the lateral portions of the strap ring and said yoke; and means for rotating the sleeve in order to shift the drum.

4f. In a friction drive, the combination of a shaft and bearings therefor; a friction disk fast on one end of the shaft; a stationary brake member at the opposite end of the shaft; a drum loose on the shaft between said friction disk and the brake member; said drum provided with flanges at its ends; the parts adapted to cause the flanges of the drum to be operatively engaged by either the friction disk or the brake member when placed in contact therewith; a sleeve on one end of the shaft exterior of the drum; said sleeve provided with a rigid crank arm; means holding said sleeve against endwise movement; ayoke threaded on said sleeve; said drum provided with a hub; a strap ring rotatably secured on said lnib; connections between said strap ring and said yoke; and means connected to said crank arm of the sleeve for rotating the latter; in order to shift the drum.

5. In a friction drive, the combination of a shaft and bearings therefor; a friction disk fast on one end of the shaft; a station ary brake member at the opposite end of the shaft; a drum loose on the shaft between said friction disk and the brake member; said drum provided with flanges at its ends; the parts adapted to cause the flanges of the drum to be operatively engaged by either the friction disk or the brake member when placed in contact therewith; a sleeve on one end of the shaft exterior of the drum; said sleeve provided with a rigid crank arm means holding said sleeve against endwise movement; a yoke threaded on said sleeve; said drum provided with a hub; a strap ring rotatably secured on said hub; said strap ring provided with lateral projections; said yoke also provided with lateral arms, bolts connecting the lateral portions of said strap ring and said yoke; and means connected to said crank arm of the sleeve for rotating the latter, in order to shift the drum.

JAMES IV. GREEN. lVitnesses GEO. A. B11013119, C. B. LONG.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

